StaticMeshComponents vanishing after creation of new StaticMeshMeshComponents

Development Programming & Scripting C++
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Hi All,
I’m experiencing an issue where I am periodically calling a method to create new StaticMeshComponents at different locations all belonging to one actor, however meshes are later disappearing.

I can’t find anything wrong in my code, but I must be missing something, or misunderstanding some element of this process - I just don’t know what.

// breaks after a certain amount of times
for (int i = 0; i < ownedLand.Num(); i++)
	{
		FSurfaceLocation& sl = ownedLand[i];

		if (sl.industryOccupied == EIndustry::Empty)
		{
			sl.industryOccupied = EIndustry::ResourceGathering;
			FString nameString = FString::Printf(TEXT("IndustryMeshComponent %d %d"), sl.SurfaceCoord.X, sl.SurfaceCoord.Y);
			FName name = FName(*nameString);
			sl.MeshComponent = NewObject<UStaticMeshComponent>(this, name);
			sl.MeshComponent->RegisterComponent();
			sl.MeshComponent->SetMobility(EComponentMobility::Movable);
			sl.MeshComponent->SetupAttachment(Root);
			sl.MeshComponent->SetStaticMesh(LoadObject<UStaticMesh>(nullptr, TEXT("/Game/StarterContent/Shapes/Shape_Sphere.Shape_Sphere")));
			sl.MeshComponent->SetWorldLocation(sl.VoxelHit.Hit.Location);
			sl.MeshComponent->SetWorldScale3D(FVector(2, 2, 2));
		}
	}

Seemingly at random, some of the older meshes are disapearing when the method is re-executed.

Animation

Here is my declartion for the FSurfaceLocation struct:

USTRUCT(BlueprintType)
struct FSurfaceLocation
{
	GENERATED_BODY()

	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Location")
	FVoxelProjectionHit VoxelHit;
	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Location")
	FVector2D SurfaceCoord;
	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Location")
	FVector AbovePoint;
	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Location")
	EIndustry industryOccupied = EIndustry::Empty;

	UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = "Location")
	UStaticMeshComponent* MeshComponent = nullptr;

};

I’ve confirmed that I’m not somehow overriding them:

			if (!sl.MeshComponent)
			{
				...
                                sl.MeshComponent = NewObject<UStaticMeshComponent>(this, name);
			}

Any ideas why meshes are disappearing?

Thanks